diff options
| -rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_uvmem.h | 6 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/ultravisor-api.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/ultravisor.h | 5 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_radix.c | 22 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_uvmem.c | 32 |
5 files changed, 66 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s_uvmem.h b/arch/powerpc/include/asm/kvm_book3s_uvmem.h index 95f389c2937b..3033a9585b43 100644 --- a/arch/powerpc/include/asm/kvm_book3s_uvmem.h +++ b/arch/powerpc/include/asm/kvm_book3s_uvmem.h @@ -18,6 +18,7 @@ unsigned long kvmppc_h_svm_page_out(struct kvm *kvm, unsigned long page_shift); unsigned long kvmppc_h_svm_init_start(struct kvm *kvm); unsigned long kvmppc_h_svm_init_done(struct kvm *kvm); +int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gfn); #else static inline int kvmppc_uvmem_init(void) { @@ -58,5 +59,10 @@ static inline unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) { return H_UNSUPPORTED; } + +static inline int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gfn) +{ + return -EFAULT; +} #endif /* CONFIG_PPC_UV */ #endif /* __ASM_KVM_BOOK3S_UVMEM_H__ */ diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index 2483f15bd71a..e774274ab30e 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -32,5 +32,6 @@ #define UV_SHARE_PAGE 0xF130 #define UV_UNSHARE_PAGE 0xF134 #define UV_UNSHARE_ALL_PAGES 0xF140 +#define UV_PAGE_INVAL 0xF138 #endif /* _ASM_POWERPC_ULTRAVISOR_API_H */ diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index 79bb005e8ee9..40cc8bace654 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -67,4 +67,9 @@ static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size, size, flags, slotid); } +static inline int uv_page_inval(u64 lpid, u64 gpa, u64 page_shift) +{ + return ucall_norets(UV_PAGE_INVAL, lpid, gpa, page_shift); +} + #endif /* _ASM_POWERPC_ULTRAVISOR_H */ diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index 2d415c36a61d..9f6ba113ffe3 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -19,6 +19,8 @@ #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/pte-walk.h> +#include <asm/ultravisor.h> +#include <asm/kvm_book3s_uvmem.h> /* * Supported radix tree geometry. @@ -915,6 +917,9 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, if (!(dsisr & DSISR_PRTABLE_FAULT)) gpa |= ea & 0xfff; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) + return kvmppc_send_page_to_uv(kvm, gfn); + /* Get the corresponding memslot */ memslot = gfn_to_memslot(kvm, gfn); @@ -972,6 +977,11 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned long gpa = gfn << PAGE_SHIFT; unsigned int shift; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) { + uv_page_inval(kvm->arch.lpid, gpa, PAGE_SHIFT); + return 0; + } + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep)) kvmppc_unmap_pte(kvm, ptep, gpa, shift, memslot, @@ -989,6 +999,9 @@ int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, int ref = 0; unsigned long old, *rmapp; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) + return ref; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) { old = kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0, @@ -1013,6 +1026,9 @@ int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned int shift; int ref = 0; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) + return ref; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_young(*ptep)) ref = 1; @@ -1030,6 +1046,9 @@ static int kvm_radix_test_clear_dirty(struct kvm *kvm, int ret = 0; unsigned long old, *rmapp; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) + return ret; + ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift); if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) { ret = 1; @@ -1082,6 +1101,9 @@ void kvmppc_radix_flush_memslot(struct kvm *kvm, unsigned long gpa; unsigned int shift; + if (kvm->arch.secure_guest & KVMPPC_SECURE_INIT_DONE) + return; + gpa = memslot->base_gfn << PAGE_SHIFT; spin_lock(&kvm->mmu_lock); for (n = memslot->npages; n; --n) { diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 4d0f544ad5f5..ed51498b20ee 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -69,6 +69,17 @@ * Shared pages: Whenever guest shares a secure page, UV will split and * remap the 2MB page if required and issue H_SVM_PAGE_IN with 64K page size. * + * HV invalidating a page: When a regular page belonging to secure + * guest gets unmapped, HV informs UV with UV_PAGE_INVAL of 64K + * page size. Using 64K page size is correct here because any non-secure + * page will essentially be of 64K page size. Splitting by UV during sharing + * and page-out ensures this. + * + * Page fault handling: When HV handles page fault of a page belonging + * to secure guest, it sends that to UV with a 64K UV_PAGE_IN request. + * Using 64K size is correct here too as UV would have split the 2MB page + * into 64k mappings and would have done page-outs earlier. + * * In summary, the current secure pages handling code in HV assumes * 64K page size and in fact fails any page-in/page-out requests of * non-64K size upfront. If and when UV starts supporting multiple @@ -630,6 +641,27 @@ out: return ret; } +int kvmppc_send_page_to_uv(struct kvm *kvm, unsigned long gfn) +{ + unsigned long pfn; + int ret = U_SUCCESS; + + pfn = gfn_to_pfn(kvm, gfn); + if (is_error_noslot_pfn(pfn)) + return -EFAULT; + + mutex_lock(&kvm->arch.uvmem_lock); + if (kvmppc_gfn_is_uvmem_pfn(gfn, kvm, NULL)) + goto out; + + ret = uv_page_in(kvm->arch.lpid, pfn << PAGE_SHIFT, gfn << PAGE_SHIFT, + 0, PAGE_SHIFT); +out: + kvm_release_pfn_clean(pfn); + mutex_unlock(&kvm->arch.uvmem_lock); + return (ret == U_SUCCESS) ? RESUME_GUEST : -EFAULT; +} + static u64 kvmppc_get_secmem_size(void) { struct device_node *np; |